<div th:fragment="css_frag">
    <link rel="stylesheet" th:href="@{/css/bootstrap.min.css}">
    <link rel="stylesheet" th:href="@{/js/jquery.js}">
    <link rel="stylesheet" th:href="@{/js/bootstrap.min.js}">
    <link rel="stylesheet" th:href="@{/font/bootstrap-icons.css}">
    <link rel="stylesheet" th:href="@{/js/modal.js}">
</div>